FirebaseAuthError: uid argument must be a non-empty string uid.

[ckt1031]

FirebaseAuthError: uid argument must be a non-empty string uid.
at FirebaseTokenGenerator.createCustomToken (/var/task/node_modules/.pnpm/firebase-admin@11.0.0_@firebase+app-types@0.7.0/node_modules/firebase-admin/lib/auth/token-generator.js:99:19)
at Auth.createCustomToken (/var/task/node_modules/.pnpm/firebase-admin@11.0.0_@firebase+app-types@0.7.0/node_modules/firebase-admin/lib/auth/base-auth.js:88:36)
at /var/task/node_modules/.pnpm/next-firebase-auth@1.0.0-canary.9_p7ezx36hea4ulp3omgbrcfrp6i/node_modules/next-firebase-auth/build/index.node.js:2:22304
at Generator.next ()
at asyncGeneratorStep (/var/task/node_modules/.pnpm/@babel+runtime@7.18.6/node_modules/@babel/runtime/helpers/asyncToGenerator.js:3:24)
at _next (/var/task/node_modules/.pnpm/@babel+runtime@7.18.6/node_modules/@babel/runtime/helpers/asyncToGenerator.js:25:9)
at processTicksAndRejections (node:internal/process/task_queues:96:5) {
errorInfo: {
code: 'auth/argument-error',
message: 'uid argument must be a non-empty string uid.'
},
codePrefix: 'auth'
}